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utils.js
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utils.js
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import { isUndefined } from '../../helpers/mixed';
import { isObject } from '../../helpers/object';
import { isRightClick } from '../../helpers/dom/event';
export const ASC_SORT_STATE = 'asc';
export const DESC_SORT_STATE = 'desc';
export const HEADER_SPAN_CLASS = 'colHeader';
/**
* Get if column state is valid.
*
* @param {Number} columnState Particular column state.
* @returns {Boolean}
*/
function isValidColumnState(columnState) {
if (isUndefined(columnState)) {
return false;
}
const { column, sortOrder } = columnState;
return Number.isInteger(column) && [ASC_SORT_STATE, DESC_SORT_STATE].includes(sortOrder);
}
/**
* Get if all sorted columns states are valid.
*
* @param {Array} sortStates
* @returns {Boolean}
*/
export function areValidSortStates(sortStates) {
if (Array.isArray(sortStates) === false || sortStates.every(columnState => isObject(columnState)) === false) {
return false;
}
const sortedColumns = sortStates.map(({ column }) => column);
const indexOccursOnlyOnce = new Set(sortedColumns).size === sortedColumns.length;
return indexOccursOnlyOnce && sortStates.every(isValidColumnState);
}
/**
* Get next sort order for particular column. The order sequence looks as follows: 'asc' -> 'desc' -> undefined -> 'asc'
*
* @param {String|undefined} sortOrder sort order (`asc` for ascending, `desc` for descending and undefined for not sorted).
* @returns {String|undefined} Next sort order (`asc` for ascending, `desc` for descending and undefined for not sorted).
*/
export function getNextSortOrder(sortOrder) {
if (sortOrder === DESC_SORT_STATE) {
return;
} else if (sortOrder === ASC_SORT_STATE) {
return DESC_SORT_STATE;
}
return ASC_SORT_STATE;
}
/**
* Get `span` DOM element inside `th` DOM element.
*
* @param {Element} TH th HTML element.
* @returns {Element | null}
*/
export function getHeaderSpanElement(TH) {
const headerSpanElement = TH.querySelector(`.${HEADER_SPAN_CLASS}`);
return headerSpanElement;
}
/**
*
* Get if handled header is first level column header.
*
* @param {Number} column Visual column index.
* @param {Element} TH th HTML element.
* @returns {Boolean}
*/
export function isFirstLevelColumnHeader(column, TH) {
if (column < 0 || !TH.parentNode) {
return false;
}
const TRs = TH.parentNode.parentNode.childNodes;
const headerLevel = Array.from(TRs).indexOf(TH.parentNode) - TRs.length;
if (headerLevel !== -1) {
return false;
}
return true;
}
/**
* Get if header was clicked properly. Click on column header and NOT done by right click return `true`.
*
* @param {Number} row Visual row index.
* @param {Number} column Visual column index.
* @param {Event} clickEvent Click event.
* @returns {Boolean}
*/
export function wasHeaderClickedProperly(row, column, clickEvent) {
return row === -1 && column >= 0 && isRightClick(clickEvent) === false;
}